in pennsylvania, a ppp poll has president obama at 52% and mitt romney at 46%. in wisconsin, president obama at 51% and mitt romney at 48%. in iowa, president obama at 47% and mitt romney at 42%. as of this afternoon, nate silver of "the new york times" 538 blog forecasts on november 6, president obama has an 85% chance of re-election and president obama will win 307 electoral votes and mitt romney 231. earlier today, chris matthews sat down for an exclusive with vice president joe biden. >> what do you think is going to happen? >> i think we're going to win. i don't think it's going to be close in the electoral college. i think we're going to win clearly and i think we're going to win this state, ohio. i've been in here 23, 24 days, we're going to win iowa, wisconsin, nevada, new hampshire. i think we've got an even chance of winning virginia and florida. so it could be a big win. don't just vote. bring your mom, your dad, cousin, knock on the door of your neighbor. let me tell you something, the middle class depends on it. >> joining me from the battleground s